Today, President Obama reneged on a long-standing agreement with America’s allies and formally abandoned the “third site” missile defense plan. The U.S. will no longer be deploying 10 missile interceptors in Poland and a radar in the Czech Republic, a plan formerly regarded as necessary for defending America’s friends and allies as well as the homeland from intercontinental and intermediate-range ballistic missiles. The decision runs contrary to U.S. strategic interests and will undermine security commitments to America’s allies.